(baseball) an eye for discerning whether a pitch is a strike or not

(baseball) discerning whether a pitch is a strike or not

(baseball) to discern whether a pitch is a strike or not

It would be good if~

baseball (ball game) / a baseball (ball used in the game)

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend

selection / choice / choosing

select / choose